only traceback for unknown errors

oml/nodes.py

@@ -11,13 +11,13 @@ import urllib.request, urllib.error, urllib.parse
 from datetime import datetime
 import os
 import time
+import socket
 
 import ox
 from tornado.ioloop import PeriodicCallback
 
 import settings
 import user.models
-from changelog import Changelog
 
 from websocket import trigger_event
 from localnodes import LocalNodes
@@ -297,6 +297,9 @@ class Node(Thread):
         self._opener.addheaders = list(zip(self.headers.keys(), self.headers.values()))
         try:
             r = self._opener.open(url, timeout=self.TIMEOUT*5)
+        except socket.timeout:
+            logger.debug('timeout %s', url)
+            return False
         except:
             logger.debug('openurl failed %s', url, exc_info=True)
             return False